In the Liangshan Tunnel, the first long tunnel of the Yu-Wu Expressway double-track, two five new rock drilling rigs "dual-machine" are running at full capacity to seize the construction period for the project!
Zhongliangshan Tunnel is one of the control projects of the whole line of the Chongqing-Wuhan project. The left tunnel is 5265 meters long, the right tunnel is 5310 meters long, and the maximum buried depth is 380.03 meters. The tunnel adopts a two-way 6-lane design and is a separate tunnel with high technical requirements. At the same time, there are unfavorable factors such as karst, underground river, gypsum, coal seam, gas, fault, landslide and other unfavorable factors during the construction process, and the safety risk is high.
Faced with multiple pressures such as tight construction schedule, heavy tasks, and high risks for the long tunnel, CCCC No. 1 Public Security Bureau Group Co., Ltd. selected Wuxin Tunnel to install a straight-arm two-arm rock drilling rig and a double-boom rock drilling rig Combined construction.
Analysis of the advantages of the "straight arm + crank arm" scheme
Compared with the traditional three-arm rock drilling rig, the three-arm can not fully exert the construction efficiency. The "straight arm + crank arm" scheme doubles the driving efficiency, gives full play to the working efficiency of the four arms, covers a large area, and greatly improves the construction efficiency.
Compared with the traditional rock drilling rig, it cannot construct three steps and inverted arch construction. The "straight arm + crank arm" scheme can not only solve the step method construction, but also adapt to the inverted arch construction, greatly improve the utilization rate of equipment, and avoid the conversion of construction methods, resulting in idle equipment.
Compared with the traditional three-arm rock drilling rig, the equipment purchase cost of the "straight arm + crank arm" solution is lower.
Compared with traditional rock drilling rigs, it is difficult to control the problem of over and under excavation. The remote control operation of the "straight arm + crank arm" scheme cooperates with the cab operation, and complements each other during construction. The operator can observe the drilling situation at close range and effectively control the over-under excavation.
With the continuous efforts of the Wuxin service team, the on-site running-in is getting better and better. At present, it only takes 2 hours to complete the drilling and blasting construction of three lanes and one face. As a leading enterprise in the tunnel industry, Wuxin has been focusing on providing customers with complete sets of construction solutions of "high efficiency, high quality, low cost and sustainable".
Wuxin Tunnel will fully assist the Chongqing-Wuzhou Expressway Project of CCCC No. 1 Public Company to jointly build a demonstration project for the construction of long-distance highway tunnels in China!